Large matrix multiplication

Multiply two square matrices as fast as possible.

Input

Two 2000 x 2000 matrices of uint32 values on STDIN, encoded back-to-back in row-major order, little-endian byte order.

Output

Write the resulting 2000 x 2000 product matrix to STDOUT in the same binary format (row-major, little-endian uint32).

Restrictions:60s256Mb 1 Score Packages

Feel free to create an issue if you need an extra library from the standard Ubuntu repository.

Name	Version	Description
libc6-dev	2.39-0ubuntu8.7	GNU C Library: Development Libraries and Header Files Contains the symlinks, headers, and object files needed to compile and link programs which use the standard C library.
libclang-common-14-dev	1:14.0.6-19build4	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-15-dev	1:15.0.7-14build3	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-16-dev	1:16.0.6-23ubuntu4	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-17-dev	1:17.0.6-9ubuntu1	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-18-dev	1:18.1.3-1ubuntu1	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-19-dev	1:19.1.1-1ubuntu1~24.04.2	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-20-dev	1:20.1.2-0ubuntu1~24.04.2	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libcrypt-dev	1:4.4.36-4build1	libcrypt development files This package contains the files needed for developing applications that use libcrypt.
libgcc-10-dev	10.5.0-4ubuntu2.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-11-dev	11.5.0-1ubuntu1~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-12-dev	12.4.0-2ubuntu1~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-13-dev	13.3.0-6ubuntu2~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-14-dev	14.2.0-4ubuntu2~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libobjc-13-dev	13.3.0-6ubuntu2~24.04.1	Runtime library for GNU Objective-C applications (development files) This package contains the headers and static library files needed to build GNU ObjC applications.
libssl-dev	3.0.13-0ubuntu3.9	Secure Sockets Layer toolkit - development files This package is part of the OpenSSL project's implementation of the SSL and TLS cryptographic protocols for secure communication over the Internet. . It contains development libraries, header files, and manpages for libssl and libcrypto.
libstdc++-10-dev	10.5.0-4ubuntu2.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-11-dev	11.5.0-1ubuntu1~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-12-dev	12.4.0-2ubuntu1~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-13-dev	13.3.0-6ubuntu2~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-14-dev	14.2.0-4ubuntu2~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libtbb-dev	2021.11.0-2ubuntu2	parallelism library for C++ - development files TBB is a library that helps you leverage multi-core processor performance without having to be a threading expert. It represents a higher-level, task-based parallelism that abstracts platform details and threading mechanism for performance and scalability. . (Note: if you are a user of the i386 architecture, i.e., 32-bit Intel or compatible hardware, this package only supports Pentium4-compatible and higher processors.) . This package includes the TBB development files.

Date	Author	Language	Status	Score
Mar 29, 2026 17:05	Dominique Garmier	RUSTrust-1.94.1	Error
Mar 29, 2026 17:03	Dominique Garmier	RUSTrust-1.94.1	Success	223,022
Mar 29, 2026 16:58	Dominique Garmier	RUSTrust-1.94.1	Success	268,483
Mar 29, 2026 16:53	Dominique Garmier	RUSTrust-1.94.1	Success	361,565
Mar 29, 2026 16:49	Dominique Garmier	RUSTrust-1.94.1	Success	228,148
Mar 29, 2026 16:32	Dominique Garmier	RUSTrust-1.94.0	Success	228,186
Mar 29, 2026 15:50	Dominique Garmier	RUSTrust-1.94.0	Success	4,572
Mar 29, 2026 15:45	Dominique Garmier	RUSTrust-1.94.0	Success	280,877
Mar 29, 2026 13:25	Dominique Garmier	CPPg++13.3.0	Success	3,467
Mar 29, 2026 12:34	Dominique Garmier	GOgo1.26.1	Success	15,832
Mar 29, 2026 12:33	Dominique Garmier	GOgo1.26.1	Success	15,809
Mar 29, 2026 12:32	Dominique Garmier	GOgo1.26.1	Success	17,745
Mar 29, 2026 12:31	Dominique Garmier	GOgo1.26.1	Success	25,178
Mar 29, 2026 12:29	Dominique Garmier	GOgo1.26.1	Success	30,429
Mar 29, 2026 10:26	Dominique Garmier	GOgo1.26.1	Success	35,276
Mar 29, 2026 10:25	Dominique Garmier	GOgo1.26.1	Success	38,756
Mar 29, 2026 10:23	Dominique Garmier	GOgo1.26.1	Success	63,569
Mar 29, 2026 02:44	Dominique Garmier	GOgo1.26.1	Success	31,673
Mar 28, 2026 03:52	Dominique Garmier	CPPclang++18.1.3	Success	3,646
Mar 28, 2026 03:51	Dominique Garmier	CPPg++13.3.0	Success	3,576
Mar 28, 2026 02:57	Dominique Garmier	RUSTrust-1.94.1	Error
Mar 28, 2026 00:57	Dominique Garmier	RUSTrust-1.94.1	Error
Mar 28, 2026 00:51	Dominique Garmier	RUSTrust-1.94.1	Error
Mar 28, 2026 00:02	olliecrow	RUSTrust-1.94.1	Success	3,409+1.72 RP
Mar 27, 2026 23:42	Dominique Garmier	CPPg++13.3.0	Success	3,595
Mar 27, 2026 23:27	Dominique Garmier	CPPg++13.3.0	Success	3,276+14.84 RP
Mar 27, 2026 23:25	Dominique Garmier	CPPg++13.3.0	Success	3,292+21.99 RP
Mar 27, 2026 23:25	Dominique Garmier	CPPclang++18.1.3	Success	3,316+137.98 RP
Mar 27, 2026 23:22	Dominique Garmier	CPPg++13.3.0	Success	3,475+20.55 RP
Mar 27, 2026 23:22	Dominique Garmier	CPPclang++18.1.3	Success	3,500+224.18 RP
Mar 27, 2026 22:53	Dominique Garmier	GOgo1.26.1	Success	45,867
Mar 27, 2026 21:05	Dominique Garmier	GOgo1.26.1	Success	33,513
Mar 27, 2026 20:23	Dominique Garmier	GOgo1.26.1	Success	38,601
Mar 27, 2026 18:22	olliecrow	CPPg++13.3.0	Success	3,416
Mar 27, 2026 18:13	Dominique Garmier	GOgo1.26.1	Success	43,352
Mar 27, 2026 16:51	Dominique Garmier	GOgo1.26.1	Success	32,489
Mar 27, 2026 13:23	Dominique Garmier	GOgo1.26.1	Success	40,650
Mar 27, 2026 13:22	Dominique Garmier	GOgo1.26.1	Success	32,367
Mar 27, 2026 13:21	Dominique Garmier	GOgo1.26.1	Success	27,353
Mar 27, 2026 13:20	Dominique Garmier	GOgo1.26.1	Success	34,046
Mar 27, 2026 13:19	Dominique Garmier	GOgo1.26.1	Success	43,461
Mar 27, 2026 12:14	Dominique Garmier	GOgo1.26.1	Success	38,152
Mar 27, 2026 11:56	Dominique Garmier	CPPclang++18.1.3	Success	3,868
Mar 27, 2026 11:53	Dominique Garmier	CPPclang++18.1.3	Success	4,785
Mar 27, 2026 10:31	Dominique Garmier	GOgo1.26.1	Success	46,488
Mar 27, 2026 10:18	Dominique Garmier	GOgo1.26.1	Success	38,431
Mar 27, 2026 10:16	Dominique Garmier	GOgo1.26.1	Success	51,705
Mar 27, 2026 10:15	Dominique Garmier	GOgo1.26.1	Success	46,009
Mar 27, 2026 06:38	Dominique Garmier	GOgo1.26.1	Success	51,163
Mar 26, 2026 20:21	Dominique Garmier	GOgo1.26.1	Success	92,546
Mar 26, 2026 20:19	Dominique Garmier	GOgo1.26.1	Success	101,613
Mar 26, 2026 12:58	Dominique Garmier	CPPclang++18.1.3	Success	4,850
Mar 26, 2026 10:58	Dominique Garmier	RUSTrust-1.94.0	Success	4,828
Mar 26, 2026 10:56	Dominique Garmier	ZIG0.13.0	Success	6,835
Mar 26, 2026 10:37	Dominique Garmier	ZIG0.13.0	Success	4,685
Mar 25, 2026 22:40	Dominique Garmier	RUSTrust-1.94.0	Success	389,059
Mar 25, 2026 22:29	Dominique Garmier	RUSTrust-1.94.0	Error
Mar 25, 2026 22:01	Dominique Garmier	RUSTrust-1.94.0	Error
Mar 25, 2026 21:38	Dominique Garmier	ZIG0.13.0	Success	4,721
Mar 25, 2026 21:37	Dominique Garmier	RUSTrust-1.94.0	Success	4,728
Mar 25, 2026 20:55	Dominique Garmier	ZIG0.13.0	Success	6,733
Mar 25, 2026 20:32	Dominique Garmier	ZIG0.13.0	Success	4,236
Mar 25, 2026 20:01	Dominique Garmier	ZIG0.13.0	Success	4,233+853.41 RP
Mar 25, 2026 17:07	Dominique Garmier	ZIG0.13.0	Success	6,627+1'070.88 RP
Mar 25, 2026 13:37	Dominique Garmier	ZIG0.13.0	Success	22,826+398.48 RP
Mar 24, 2026 19:02	Dominique Garmier	RUSTrust-1.94.0	Success	16,103
Mar 24, 2026 19:01	Dominique Garmier	RUSTrust-1.94.0	Success	4,842
Mar 24, 2026 03:08	Dominique Garmier	CSHARP9.0.14	Success	57,512
Mar 24, 2026 00:45	Dominique Garmier	GOgo1.26.1	Success	71,703
Mar 23, 2026 16:45	Dominique Garmier	CPPg++13.3.0	Success	4,569
Mar 23, 2026 16:44	Dominique Garmier	CPPg++13.3.0	Success	5,055
Mar 23, 2026 15:47	Dominique Garmier	CPPclang++18.1.3	Success	4,840
Mar 23, 2026 15:46	Dominique Garmier	CPPclang++18.1.3	Success	3,798+142.92 RP
Mar 23, 2026 15:45	Dominique Garmier	CPPg++13.3.0	Success	4,016+29.41 RP
Mar 23, 2026 06:37	Dominique Garmier	CPPg++13.3.0	Success	4,472
Mar 23, 2026 06:36	Dominique Garmier	CPPg++13.3.0	Error
Mar 23, 2026 06:35	Dominique Garmier	CPPg++13.3.0	Error
Mar 23, 2026 06:34	Dominique Garmier	CPPg++13.3.0	Error
Mar 23, 2026 06:05	olliecrow	CPPg++13.3.0	Success	3,413
Mar 23, 2026 05:45	Dominique Garmier	CPPg++13.3.0	Success	4,662
Mar 23, 2026 05:43	Dominique Garmier	CPPclang++18.1.3	Success	4,221
Mar 23, 2026 05:41	Dominique Garmier	CPPg++13.3.0	Success	5,270
Mar 23, 2026 05:20	Dominique Garmier	CPPg++13.3.0	Success	5,247
Mar 23, 2026 05:20	Dominique Garmier	CPPclang++18.1.3	Error
Mar 23, 2026 05:08	Dominique Garmier	CPPclang++18.1.3	Success	4,203
Mar 23, 2026 05:07	Dominique Garmier	CPPg++13.3.0	Success	4,950
Mar 23, 2026 04:56	Dominique Garmier	CPPg++13.3.0	Success	5,004
Mar 23, 2026 04:17	Dominique Garmier	CPPg++13.3.0	Success	5,005
Mar 23, 2026 03:48	Dominique Garmier	CPPg++13.3.0	Success	5,008
Mar 23, 2026 03:40	Dominique Garmier	CPPg++13.3.0	Success	4,997
Mar 23, 2026 03:06	Dominique Garmier	CPPg++13.3.0	Success	4,477
Mar 23, 2026 03:03	Dominique Garmier	CPPg++13.3.0	Success	4,298
Mar 23, 2026 02:33	Dominique Garmier	CPPg++13.3.0	Success	4,270
Mar 23, 2026 01:15	Dominique Garmier	CPPg++13.3.0	Success	4,998
Mar 23, 2026 01:12	Dominique Garmier	CPPclang++18.1.3	Error
Mar 23, 2026 01:11	Dominique Garmier	CPPg++13.3.0	Success	4,120
Mar 23, 2026 01:09	Dominique Garmier	CPPg++13.3.0	Success	4,064+97.68 RP
Mar 23, 2026 01:05	Dominique Garmier	CPPg++13.3.0	Success	4,279
Mar 23, 2026 01:04	Dominique Garmier	CPPg++13.3.0	Success	4,238
Mar 23, 2026 01:02	Dominique Garmier	CPPg++13.3.0	Error

Model	Intel(R) Xeon(R) CPU E3-1271 v3 @ 3.60GHz
Cores	1